Solutions to Penrose's ‘Road To Reality’
Chapter 7: Complex-number calculus

§7.2 Contour integration
7.1 * An easy contour integral
§7.3 Power series from complex smoothness
7.2 * Consistency of Cauchy's differentiation formula
7.3 ** Proof of Cauchy's differentiation formula
7.4 ** The residue theorem
7.5 *** Applications of contour integration (I): The Dirichlet integral
7.6 *** Applications of contour integration (II): The Basel problem
§7.4 Analytic continuation
7.7 ** Power series representation for 1/z
7.8 ** Power series representation for log z